What is a good programming pattern for handling return values from stdio file writing functions

Question

I\'m working on some code that generates a lot of

ignoring return value of ‘size_t fwrite(const void*, size_t, size_t, FILE*)’, declared with attribute warn         


        

Answer 1

Something like this would work

if (fwrite (&blah, sizeof (blah), 1, fp) != 1) throw SomeException;

If you're worried about pointers being cleaned up you can wrap the pointer in some form of smart pointer before carrying out your fwrite's.

If you don't want to use smart pointers then this will work, but it's messy, so I'd try the smart pointer route first

if (fwrite (&blah, sizeof (blah), 1, fp) != 1) {
    //cleanup here
    throw SomeException;
}